Communications: electrical – Digital comparator systems
Patent
1980-04-25
1982-11-23
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
307261, 307360, 235463, G06K 938
Patent
active
043607985
ABSTRACT:
Laser light reflected from a bar code symbol pattern is detected by a photodetector mounted in a portable scanning head of a laser scanning system. By selecting appropriate threshold values on the analog signal generated by the photodetector, the analog signal is converted to a series of pulses, each pulse width accurately corresponding to the width of a bar from the scanned pattern. A plurality of functions can be determined from the series of pulses, each function being independently selected by keyboard entry from the head, displayed on the head, and/or recorded by a printer remote from the head. Single line or multiple line scans in two orthogonal directions relative to the pattern may be selected. A bimorph or speaker-type oscillatory element may be utilized as a miniature scanning element. Circuitry for synchronizing scanning along both axes, and for generating a signal to drive the bimorph in a uniform, constant velocity manner is also disclosed.
REFERENCES:
patent: 3299271 (1967-01-01), Stites
patent: 3502993 (1970-03-01), Schurzinger et al.
patent: 3668634 (1972-06-01), Kruklitis
patent: 3804979 (1974-04-01), Knowles
patent: 3879707 (1975-04-01), Rohrer
patent: 3890597 (1975-06-01), Hanchett
patent: 3932840 (1976-01-01), Hanchett
patent: 3999043 (1976-12-01), Reiss et al.
patent: 4020357 (1977-04-01), Punis
patent: 4109211 (1978-08-01), Mese et al.
patent: 4175256 (1979-11-01), Dolikian
Barkan Edward
Brown George
Delfine Frank
Harrison Shelley A.
Swartz Jerome
Boudreau Leo H.
Symbol Technologies Inc.
LandOfFree
Portable laser scanning arrangement for and method of evaluating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable laser scanning arrangement for and method of evaluating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable laser scanning arrangement for and method of evaluating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1881203